Is it theoretically possible to write manual memory deallocations from Heap without consuming libc's free in windows apis. (Possibly rewrite some functions of the Api in C#)? Zerolib doesn't have manual heap deallocations. The problem is zerolib is trying to be compatible with .NET. so anything the .NET doesn't support cannot be added to zerolib. We know .net internally uses windows API via marshalless invoke/ p invoke. Can this API be written in C# with zerosharp since it allows c# to be run on baremetal?